What was found
(CAN) PILOT REPORTED A SLIGHT JERK 10 MIN BEFORE LANDING ON DECK. AN INSPECTION WAS DONE ON DECK AND REPORTED THE DOOR FITTING BROKEN. ACFT WAS SHUTDOWN, DOOR TIED DOWN AND ACFT FLEW BACK TO BASE WITH LANDING GEAR EXTENDED AND WITHOUT ANY PASSENGERS ONBOARD. BRACKET WAS REMOVED AND REPLACEMENT INSTALLED THE BROKEN LINKAGE WAS REPLACED BY ENGINEERING AND THE ACFT RETURN TO SERVICE.